*{
    margin: 0;
    padding: 0;
}
.box{
    width: 300px;
    height: 300px;
    border: 2px solid black;
    margin:200px auto;
    
}
.box .title{
    padding-top: 25px;
    text-align: center;
}
.box .box-name{
    margin-left: 25px;
    margin-top: 20px;

}
.box #username{
    width: 250px;
    height: 25px;
    margin-left: 25px;
}
.box #password{
    width: 250px;
    height: 25px;
    margin-left: 25px; 
}
.box #btn{
    width: 250px;
    height: 30px;
    background-color: chartreuse;
    margin:30px auto;
    margin-left: 25px;
    text-align: center;

}